We're dividing 152749 by 42 
The aim is to understand the frequency of 42 in 152749.

Let's proceed to step 1:
1 divided by 42 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 42

On to step 2:
The number 42 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Grab the next digit (2) from the dividend, add it to 15, then carry on: 152 / 42

Going ahead to step 3:
42 goes into 152 3 times with a remainder of 26.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 126 from 152 and we're left with 26.
Bring next digit (7) of the dividend behind the 26 and repeat the process: 267 / 42

Let's proceed to step 4:
The number 42 fits into 267 6 times, leaving a remainder of 15.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
If we subtract 252 from 267, we get 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 42

Let's proceed to step 5:
If we divide 154 by 42, we get 3 and a remainder of 28.
Record the quotient 3 as the next digit in the result. 
Result so far: 363.0
The remainder is 28 after subtracting 126 from 154.
Grab the next digit (9) from the dividend, add it to 28, then carry on: 289 / 42

Moving on to step 6:
If we divide 289 by 42, we get 6 and a remainder of 37.
The next digit of our result is 6. 
Result so far: 3636.0
If we take 252 away from 289, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 7:
If we divide 370 by 42, we get 8 and a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 3636.8
Subtract 336 from 370 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
42 can be fit into 340 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 3636.88
Subtract 336 from 340 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 3636.88 and a remainder of 0.004.